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IPC mid-term study
IPC Mid-term study cards (straight from the review) Chaps 8-14
| Question | Answer |
|---|---|
| 5. A 1st class lever has the | 5. Fulcrum in the middle |
| 6. How loud a sound is depends on | 6. Amplitude |
| 7. A sonar system measures distance by determining the | 7. Reflected sound waves |
| 8. An image that results from an apparent path of light rays is called | 8. Virtual image |
| 9. A tug-of-war that results in one team pulling the other across the line is an example of | 9. Unbalanced forces |
| 10. A man is standing on the shore of a beach, up to his knees in water. Every 5 seconds a wave breaks on him. What is the period of the wave? | 10. 5 seconds |
| 11. As kinetic energy of the molecules in a substance increases, the | 11. Temperature increases |
| 12. A child is sending pules down a stretched rope at a rate of 2 pules per second. The distance between the pules is 5 meters. What is the speed of the wave? | 12. 10 m/s |
| 13. An inclined plane (define and list characterists) | 13. Changes magnitude and direction |
| 14. Sound waves are called ____ waves that alternate molecules close together (called ____) and spread apart (called ____). | 14. Longitudinal, compression, rarefraction |
| 15. A set of electric trains are powered by a 9V battery. What is the resistance of the trains if they draw 3.0 A of current? | 15. 3 Ω |
| 16. If the net force acting on a stationary object is zero, then the object will | 16. Not move/remain at rest |
| 17. A train of waves is moving at a speed of 30 m/s. The frequency of the waves is 10 Hz. What is the wavelength? | 17. 3 meters |
| 18. Weight is best described as | 18. Weight-the force with which gravity pulls on quantity |
| 19. If you are given the mass of an object in pounds, the time in seconds, and the distance in feet, what must you do before you can calculate the momentum in SI units? | 19. Convert lbs to Kg and distance to meters |
| 20. Energy from the sun reaches Earth by | 20. Radiation |
| 21. If one kilogram is equal to 2.2 lbs, calculate the weigh of an object that is 50 kgs? | 21. 490 Kgs |
| 22. The efficiency of a ramp is 75%. If the amount of work input is 240 J, what is the amount of work output? | 22. 100 |
| 23. List the characteristics of a diverging lens | 23. Bends light outward |
| 24. An example of a naturally occurring magnetic rock is | 24. Lodestone |
| 25. What is the gravitational potential energy of a 55 Kg box that is 8.0 Meters above the ground? | 25. 4300 J |
| 26. 26. The transfer of energy as heat caused by the collision of molecules is called | 26. Conduction |
| 27. The greatest gravitational force would occur between what kind of objects? | 27. Moon and Earth |
| 28. What causes a compass needle to point to geographic north? | 28. The ‘pull’ of the magnetic field |
| 29. The law that states that every object maintains constant velocity unless acted on by an unbalanced force is | 29. Newton’s first law |
| 30. What is -175˚ C on the Kelvin scale? | 30. 98 K |
| 31. What are the units of power? | 31. Watts, horsepower, J/s |
| 32. Light waves (define and list characteristics) | 32. Electromagnetic waves |
| 33. What are the factors in calculating momentum? | 33. Mass x velocity |
| 34. All waves transfer _____. | 34. Energy |
| 35. What is potential difference across a resistor that dissipates 5.00 W of power and has a current of 5.0 A? | 35. 1.0 V |
| 36. Potential difference is measured in | 36. Volts |
| 37. What is 175˚ F on the Celsius scale? | 37. 79.4˚ C |
| 38. In order to determine speed, you must know | 38. Time and distance |
| 39. A boy pushes on a parked car with a force of 200 N. The car does not move. How much work does the boy do on the car? | 39. Zero |
| 40. The law of conservation of energy states that | 40. Energy cannot be created nor destroyed |
| 41. What indicates velocity? | 41. Ex. 28 Km from LA to Catalina (has to have a distance and from one place to another) |
| 42. The brakes on a car exert a frictional force of 6000 N in getting the car to stop. If the work done by the brakes is 120,000 J in coming to a stop, how many meters did the car travel after the driver applied the brakes? | 42. 20 M |
| 43. What are examples of a third-class lever? | 43. Hand |
| 44. There is a potential difference of 12 V across a resistor with 0.25 A of a current in it. The resistance of the resistor is | 44. 48 Ω |
| 45. An orange looks orange because it | 45. Reflects orange and absorbs all other colors |
| 46. The temperature of a substance increases by 3 K when 1635 J is added to a 2 kg quantity of the substance. What is the specific heat of the substance? | 46. 272 J/kg•K |
| 47. The color of light is determined by ___of the light waves. | 47. Frequency |
| 48. A medicine ball has a mass of 5 kg and is thrown with the speed of 2 m/s. What is its kinetic energy? | 48. 10 J |
| 49. A pendulum is swinging back and forth and has a kinetic energy of 400 J at a particular point in its path. Which of the following statements is not true? | 49. KE and PE are decreasing |
| 50. The intensity of a sound describes | 50. Loudness at a particular direction |
| 51. The SI unit of resistance is the | 51. Ohm (Ω) |
| 52. A wave with a frequency of 0.5 Hz and a speed of 10 m/s has a wavelength of | 52. 20 M |
| 53. Friction is defined as | 53. -force that opposes motion between 2 surfaces |
| 54. The difference between speed and velocity is that velocity includes | 54. Direction |
| 55. The SI unit force, named for the scientist who described the relationship between motion and force, is | 55. Newton |
| 56. How much heat energy will cause the temperature of 7 kg of carbon to increase its temperature by 15 K? The specific heat of iron is 449 J/kg•K. | 56. 4.7 x 10000 J |
| 57. What is the approximate terminal velocity of a sky diver before the parachute opens? | 57. 320 Km/h |
| 58. Sound travels fastest in | 58. Solid |
| 59. Which substance is the best conductor of transferring energy as heat? | 59. Iron |
| 60. White light breaks up into different colors when it passes through a prism because of | 60. The differences in wave speed |
| 61. What are the types of electric cells? | 61. Dry, wet, photo, solar |
| 62. An object has a kinetic energy of 810J after falling a certain distance. If a mass of the object is 20kg, what is the speed of the object at this time? | 62. 9 m/s |
| 63. Every charged particle produces | 63. Electric field |
| 64. Electric force varies depending on the | 64. Charge and distance between charged objects |
| 65. When a glass rod is rubbed with silk and becomes positively charged, | 65. Electrons are removed from the rod |
| 66. An electric motor and a generator are similar in that both | 66. Transform energy into different form, Transport energy but not water |
| 67. Water waves (list characteristics) | 67. Water boils at 212˚ and freezes at 32˚ |
| 68. The Fahrenheit temperature scale is defined by what temperatures? | 68. Energy as heat flows from a higher temperature to a lower temperature |
| 69. The law states that for every action force there is an equal and opposite reaction force is | 69. Newton’s 3rd law |
| 70. A man pushes a crate along a factory floor by exerting a force of 55 N. If the crate moves a distance of 4.0 m, how much work does the man perform? | 70. 220 N |
| 71. Light that enters one end of a fiber optic cable reaches the other end by means of | 71. Total internal |
| 72. Which type of electromagnetic waves has the highest frequency and is used to kill cancer cells? | 72. Gamma waves |
| 73. Electric field lines | 73. Point toward negative charged, never cross 1 another, point away from positive |
| 74. What happens to the resistance of a superconductor when its temperature drops below the critical temperature? | 74. Resistance drops to zero |
| 75. The transfer of energy by the movement of fluids or gases with different temperatures is called | 75. Convection |
| 76. A wheelbarrow is an example of a | 76. 2nd class |
| 77. What is the mechanical advantage of a ramp that is 10 meters long and 2 meters high? | 77. 5 |
| 78. The amplitude of the above wave is | 78. .5 m |
| 79. A 10.0 kg dog chasing a rabbit north at 6.0 m/s has a momentum of | 79. 60 kg m/s North |
| 80. The brightness of a light bulb is determined by its filament’s | 80. Resistance |
| 81. What instrument is used to trace the direction of a magnetic field? | 81. Compass |
| 82. Which type of electromagnetic waves has slightly longer wavelengths than red light? | 82. Infrared light |
| 83. Like magnet poles always | 83. Repel each other |
| 84. Acceleration is defined as the change in velocity divided by | 84. Time |
| 85. A weightlifter presses a 400 N weight 0.5 over his head in 2 seconds. What is the power of the weightlifter? | 85. 100 watts |
| 86. Suppose a fixed number of joules of energy as heat is added to 1 kg of the substances listed below. For which substance will the rise in temperature be the least? | 86. Water |
| 87. What are the examples of a wheel and axle? | 87. Screwdriver |
| 88. Convection currents rise in air because | 88. Cool air descends and hot air rises |
| 89. Whenever an object is standing still, the value(s) that is/are always zero is/are | 89. Speed, velocity, momentum |
| 90. The strength of the magnetic field | 90. Decreases as distance from magnet increases |
| 91. On a velocity-time graph, a line with a negative slope indicates that the object is | 91. Slowing down |
| 92. There is a repulsive force between two charged objects when | 92. Charges are of like sign |
| 93. The law that states that the unbalanced force acting on an object equals the object’s mass times its acceleration is | 93. Newton’s 2nd law |
| 94. Generators convert | 94. Mechanical energy to electric energy |
| 95. What are the units of work? | 95. J, N٠m, kg٠m2/s2 |
| 96. A color television draws about 2.5 A when it is connected to a 120 V outlet. Assuming electrical energy costs $0.060 per kW٠h, what is the cost of running the television for exactly 8 hours? | 96. .14 K |
| 97. If you divide momentum by velocity, the result is the value of the object’s | 97. Mass |
| 98. What affects a material’s resistance? | 98. Ohms law |
| 99. The north pole of one magnet will be | 99. Repelled by N. Pole of another magnet |
| 100. A care traveled 1400 km from El Paso to Dallas in 20 hours. What is the average velocity? | 100. 70 ??? |
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